Corner strip for plastered walls



E. H. JONES. Y CORNER STRIP FGR FLASTERED WALLS.

APPLICATION FILED JAN. 20. I9I9.

AQQPQQQ., L www June 20, 1922c I wa IIIIILIILIIIIIII Il IIIIII III' Iv I'II'y IIIII Il IIII IIIII IIII 11mm y 1% nur err EDMUND H. JONES, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO MILWAUKEE CORRU- GATING COMPANY, 0F MILWAUKEE, WISCONSIN, A CORPORATION 0F WISCONSIN.

CORNER s'rRrr RoR 1l,4l2,4l Specification of T 0 azZZ whom z' may' concern:

Be it known-that I, EDMUND H. JONES, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of lVisconsin, have invented certain new and useful Improvements in Corner Strips for Plastered'VValls, of which the following is a specification," reference being had to t' e accompanying drawing, forming a part thereof.

rl`his invention relates more particularly to sheet metal reinforcing and division strips and corner ground guide or gage beads for reentrant angles o plastered walls.

The main objects of the invention are tol insure true angles at the intersection of plastered walls; to facilitate the applica-l tion of plaster tovwalls adjacent corners formed thereby; to prevent the cracking of the plaster in 'and adjacent to the corners; to provide a more effective bonding of the plaster to the foundation. therefor adjacent and close to the angles; to form comparatively sti beads, which will maintain their shape, integrally with flexible attachment and bonding wings, which are adaptable to rough uneven surfaces, from comparatively narrow strips of sheet metal; and generally to improve the construction of devices of this class. -f

It consists in the construction, arrangement and combination of parts asfhereinafter particularly described and pointed out in the claim.

In the accompanying drawing like characters designate the same parts in the several figures. j

Fig. 1 is a perspective view of an inside corner strip made in accordance with the invention; Fig. 2 is a cross section thereof on the line 2 2, Fig. 1; and Fig. 3 is a plan view of a slitted blank having crimped margins for an inside corner strip.

Referring to Figs. 1 and 2, showing a corner stripI as constructed for inside corners or reentrant angles of plastered walls, a comparatively narrow blank of sheetmetal of comparatively thin gage,l is slitted lengthwise on opposite sides of a plain imperforate central portion and marginal portions o, as shown in Fig. 3. The slits o of each transverse row are shown as straight, and in staggered relation to those of the adjacent rows, so that by stretching the blank transversely, the slitted portions will be ax- PLASTERED warns.

Letters Patent.

pan-ded into diamond-shaped meshes, the

strands of the meshes assuming planes oblique or approximately perpendicular to the plane of the blank, as shown in Figs. land 2. Other forms of mesh suitable for the purpose may .be made by varying the shape and arrangement of the slits.

The margins ZJ of the blank are preferably crimped tran'sversefly as shown in Figs. l and 3, to stifien and cause themto maintain their shape when the slitted portions of the blank are expanded, and to lie Hat against the walls to which they are applied. rflue plain central portion an of the blank is bent inwardly, either before or after the expansion of the slitted portions, to 4form an expansible division fold and inwardly pro jecting bead at, from which the slitted portions of the blank diverge at an angle to each other, as shown in Fig. 2, approximately corresponding with the angle formed by the intersection of the walls to which the'strip is to be applied. The divergent slitted portions, withtheir margins vb, form wings e, for attaching or fastening the strip 'to the walls to which the plaster is to be applied, and securely bonding the plaster coatings thereto adjacent and close to the division fold and bead, the expanded meshes of the wings through which the plaster is lpressed and with which it interlocks, extending close Patented aan@ 2o, ieee.

Application led January 5&0,A 1919. Serial No. 272,136.

sol

to the fold and bead. The division fold atthe base of the bead d, the sides of which 'are prikmarily brought close together at thebase ofthe bead, is expansible, and separates the plaster coatings from each other at the corner, thereby permitting them to recedeor shift with. l

any ordinary shrinking, swelling or war ing ofthe plaster foundation, without-crac ing the laster. The bead al' consisting of two-ply inwardly diverging folds or flanges f, overhanging and parallel with the wings e,

forms grounds, guides or gages to facilitate the appllcation of the plaster and determinin its proper thickness.

' he folds or flanges f and the adjoining'v bead makes it stiff and tends to maintain the truel rectilinear form of the exposed reentrant angle formed by the intersection of the divergent folds orfflanges f, without inter-` fering with the flexibility of the wings e and their adaptability to rough, irregular' or uneven Walls.

The inward bends of the wings e adjoining the expansible fold and bead d form a recess atthe back of the corner strip, which facilitates placing and fastening the strip in proper position as it avoids contact with 0bstructions such as splinters etc., which often occur inv corners formed by the intersection of 4rough unfinished walls.

The corner strip as herein shown and described, requires less metal than corner strips having unexpanded wings of the same eX- tent, and the metal used is distributed to better advantage to bond-and reinforce the plaster adjacent the corners. The open mesh of the slitted and expanded attachment wings,

affords a more eective bond for the plaster adjacent and close to the bead, than notched,

paratively inexible corner gage bead and on opposite sides of the fold with comparatively flexible slitted and expanded attachment and plaster bonding Wings at an angle to each other, the bead consisting of inwardly diverging two-ply folds parallel with and overhanging the wings and forming therewith recesses to receive and confine adjoining edges of plaster coatings.

In witness whereof -I hereto aliix my signature.

EDMND H. JONES. 

